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authorKevin Wolf <kwolf@redhat.com>2010-05-21 17:59:36 +0200
committerKevin Wolf <kwolf@redhat.com>2010-05-28 13:29:11 +0200
commit1c46efaa0a175e468772405385ca26a1e35dd94c (patch)
treee4238b6824fd4e1b712f76b44f41601b527b5de0 /block/qcow2.h
parentc63782cbe8bdc2c401ea710cef427de0214c5900 (diff)
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qcow2: Allow qcow2_get_cluster_offset to return errors
qcow2_get_cluster_offset() looks up a given virtual disk offset and returns the offset of the corresponding cluster in the image file. Errors (e.g. L2 table can't be read) are currenctly indicated by a return value of 0, which is unfortuately the same as for any unallocated cluster. So in effect we can't check for errors. This makes the old return value a by-reference parameter and returns the usual 0/-errno error code. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2.h')
-rw-r--r--block/qcow2.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/qcow2.h b/block/qcow2.h
index 01053b7..c59b827 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -196,8 +196,8 @@ void qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
int nb_sectors, int enc,
const AES_KEY *key);
-uint64_t qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
- int *num);
+int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
+ int *num, uint64_t *cluster_offset);
int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
int n_start, int n_end, int *num, QCowL2Meta *m);
uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,